• CN：11-2187/TH
• ISSN：0577-6686

›› 2005, Vol. 41 ›› Issue (3): 221-225.

• 论文 •

### 形状记忆合金智能复合材料自修复中传感与控制方法研究

1. 同济大学机械工程学院;东京工业大学大学院机械科学科
• 发布日期:2005-03-15

### RESEARCH ON SENSING AND CONTROL OF SHAPE MEMORY ALLOY EMBEDDED IN INTELLIGENT MATERIAL

Zhu Yutian;Hagiwara Ichiro;Yasuhiro Mohri

1. College of Mechanical Engineering, Tongji University Department of Mechanical Engineering and Science, Tokyo Institute of Technology
• Published:2005-03-15

Abstract: For intelligent materials embedded with shape memory alloy (SMA) wires, a method based on checking the resistance variation of the SMA is proposed. By this method, the strain caused by tensile load can be measured and the damage of the matrix be estimated. The strain caused by the temperature effect is compensated; hence the sensing error is eliminated by using a reference SMA wire. During the self-repair process, generally the temperature state of SMA wires embedded in composites is uncertain due to the ambient temperature, the heat convection, the heat radiation or the external current inputted for heating, to suppress the crack(s) by inducing the SMA phase transformation as fast as possible but not to overheat or burn the matrix or the SMA itself, a dynamic heating/self-sensing method which can detect the beginning and the ending of the SMA phase transformation based on the feedback of the SMA resistance variation is proposed and verified in laboratory experiments. Analytical solutions are compared favorably with the experimental data.